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Reinsurance (Reinsurance Amounts Recorded on Consolidated Statements of Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance [Abstract]
Direct insurance premiums and fee income									$ 13,941	$ 14,172	$ 13,304
Reinsurance assumed									98	94	95
Reinsurance ceded									(1,898)	(1,744)	(1,656)
Total insurance premiums and fee income									12,141	12,522	11,743
Direct insurance benefits									15,065	10,714	10,630
Reinsurance recoveries									(2,519)	(2,185)	(1,953)
Benefits	$ 1,985	$ 5,103	$ 2,890	$ 2,568	$ 2,251	$ 2,121	$ 1,930	$ 2,227	$ 12,546	$ 8,529	$ 8,677

X

- Definition

Amount of written premiums assumed from other entities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 605
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
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+ References

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+ References

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